My motor just got worked on this past weekend as I had white smoke coming from the exhaust plus a knocking sound. I'm not getting any smoke coming from the exhaust but after running my car for a little bit the knocking sound came back and now i am unable to change gears after starting the car. When I rev the motor i can see white smoke coming from under the block and i can also a hear a crackling sound.... i think it is the clutch but i have no clue

any help will be welcomed
thanx

 

Probably your clutch.

 

so does smoke come from the clutch when it is time to replace it?

 

No, but the smoke in the exhaust has nothing to do with your clutch not operating. Obviously there's a problem with your clutch since you cant change gears...your clutch seems to not be disengaging.

 

thanx for the response... i will get it checked out